Granted Patent
Utility
US 5,113,940 · App. 07/700,622
Well apparatuses and anti-rotation device for well apparatuses
Inventor:
Mark C. Glaser
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: May 15, 1991
Inventor
Mark C. Glaser
Assignee (at issue)
Weatherford Holding U.S., Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.